Dump truck



FIG. 1 is a left-side elevational view of our design for a dump truck;

FIG. 2 is a right-side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom view thereof.

In the drawings, the broken lines depict unclaimed subject matter andform no part of the claimed design.

The ornamental design for a dump truck, as shown and described. 